package com.slipper.system.config;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;

@Configuration
@EnableAsync
public class ExecutorConfiguration implements AsyncConfigurer {
    private static final Logger logger = LoggerFactory.getLogger(ExecutorConfiguration.class);

    @Override
    public Executor getAsyncExecutor() {
        logger.info("start asyncServiceExecutor");
        ThreadPoolTaskExecutor executor = new VisibleThreadPoolTaskExecutor();
        // 配置核心线程数
        executor.setCorePoolSize(10);
        // 配置最大线程数
        executor.setMaxPoolSize(20);
        // 配置队列大小
        executor.setQueueCapacity(99999);
        // 配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("async-service-");
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        // executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 执行初始化
        executor.initialize();
        return executor;
    }
    
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return (ex, method, params) -> logger.error("method: " + method.getName(), ex);
    }
}